Testing and certification of lithium cobalt oxide battery
Lithium cobalt oxide battery has stable structure, high capacity ratio and outstanding comprehensive performance, but its safety is poor and its cost is very high. It is mainly used in small and medium-sized batteries, and widely used in notebook computers, mobile phones, MP3 / 4 and other small electronic equipment, with a nominal voltage of 3.7V. Lithium cobalt oxide was first commercialized because of its simple production process and stable electrochemical performance. The first generation of lithium cobalt oxide has low compaction density, with about 0.55 lithium ions at most, which can be reversible de embedded. Excessive lithium ions will cause structural phase transition, lattice oxygen loss and electrolyte oxidation decomposition, etc., resulting in short service life and being eliminated by the society By increasing the sintering temperature and times of lithium cobalt oxide, single crystal primary grains of more than ten microns were synthesized by high-density synthesis process before and after the year. The compacted density of lithium cobalt oxide electrode was increased to more than 4.0 g / cm3. The second generation of lithium cobalt oxide was born, which made its application in small cell market more attention.